Preheat the oven to 375°F (190°C) and line a rimmed baking sheet with parchment paper or a silicone baking mat.
In a large mixing bowl, combine the raw sausage, biscuit baking mix, shredded cheddar cheese, garlic powder, and dried parsley.
Mix the ingredients on low speed using a stand mixer with a paddle attachment or by hand until a cohesive dough forms and the sausage is evenly distributed.
Add the milk one tablespoon at a time if the mixture is too dry to hold together; the dough should be moist enough to roll without crumbling.
Scoop approximately 1 tablespoon of the mixture and roll it between your palms to form a 1-inch ball.
Place the balls on the prepared baking sheet, spaced roughly 1 inch apart.
Bake for 18 to 22 minutes until the sausage is fully cooked and the exteriors are lightly browned.
Remove from the oven and allow the balls to rest on the sheet for 5 minutes to firm up before transferring to a serving platter.